English Revised Version (ERV)

Clarke's Commentary on Leviticus 19:26

Neither shall ye use enchantment - לא תנחשו lo thenachashu. Conjecture itself can do little towards a proper explanation of the terms used in this verse. נחש nachash; See note at Genesis 3:1 (note), we translate serpent, and with very little propriety; but though the word may not signify a serpent in that place, it has that signification in others. Possibly, therefore, the superstition here prohibited may be what the Greeks called Ophiomanteia, or divination by serpents.

Nor observe times - ולא תעוננו velo teonenu, ye shall not divine by clouds, which was also a superstition much in practice among the heathens, as well as divination by the flight of birds. What these prohibitions may particularly refer to, we know not. See Clarke's note on Genesis 41:8.

Barnes' Notes on Leviticus 19:26

Certain pagan customs, several of them connected with magic, are here grouped together. The prohibition to eat anything with the blood may indeed refer to the eating of meat which had not been properly bled in slaughtering (Leviticus 7:26; Leviticus 17:10, etc.): but it is not improbable that there may be a special reference to some sort of magical or idolatrous rites. Compare Ezekiel 33:25.

Leviticus 19:26

Observe times - It is not clear whether the original word refers to the fancied distinction between lucky and unlucky days, to some mode of drawing omens from the clouds, or to the exercise of "the evil eye."

Wesley's Notes on Leviticus 19:26

19:26 Any thing with the blood - Any flesh out of which the blood is poured. Neither shall ye use enchantments - It was unpardonable in them, to whom were committed the oracles of God, to ask counsel of the devil. And yet worse in Christians, to whom the son of God is manifested, to destroy the works of the devil. For Christians to have their nativities cast, or their fortunes told, or to use charms for the cure of diseases, is an intolerable affront to the Lord Jesus, a support of idolatry, and a reproach both to themselves, and to that worthy name by which they are called. Nor observe times - Superstitiously, esteeming some days lucky, others unlucky.